package com.sniper.utils;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import net.coobird.thumbnailator.Thumbnails;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * 图片工具类， 图片水印，文字水印，缩放，补白等
 *
 * @author Carl He
 */
public final class ImageUtils {
    /**
     * 图片格式：JPG
     */
    private static final String PICTRUE_FORMATE_JPG = "jpg";

    private ImageUtils() {
    }

    /**
     * 添加图片水印
     *
     * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg
     * @param waterImg  水印图片路径，如：C://myPictrue//logo.png
     * @param x         水印图片距离目标图片左侧的偏移量，如果x<0, 则在正中间
     * @param y         水印图片距离目标图片上侧的偏移量，如果y<0, 则在正中间
     * @param alpha     透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明)
     */
    public final static void pressImage(String targetImg, String waterImg,
                                        int x, int y, float alpha) {
        try {
            File file = new File(targetImg);
            Image image = ImageIO.read(file);
            int width = image.getWidth(null);
            int height = image.getHeight(null);
            BufferedImage bufferedImage = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufferedImage.createGraphics();
            g.drawImage(image, 0, 0, width, height, null);

            Image waterImage = ImageIO.read(new File(waterImg)); // 水印文件
            int width_1 = waterImage.getWidth(null);
            int height_1 = waterImage.getHeight(null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));

            int widthDiff = width - width_1;
            int heightDiff = height - height_1;
            if (x < 0) {
                x = widthDiff / 2;
            } else if (x > widthDiff) {
                x = widthDiff;
            }
            if (y < 0) {
                y = heightDiff / 2;
            } else if (y > heightDiff) {
                y = heightDiff;
            }
            g.drawImage(waterImage, x, y, width_1, height_1, null); // 水印文件结束
            g.dispose();
            ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 添加文字水印
     *
     * @param targetImg 目标图片路径，如：C://myPictrue//1.jpg
     * @param pressText 水印文字， 如：中国证券网
     * @param fontName  字体名称， 如：宋体
     * @param fontStyle 字体样式，如：粗体和斜体(Font.BOLD|Font.ITALIC)
     * @param fontSize  字体大小，单位为像素
     * @param color     字体颜色
     * @param x         水印文字距离目标图片左侧的偏移量，如果x<0, 则在正中间
     * @param y         水印文字距离目标图片上侧的偏移量，如果y<0, 则在正中间
     * @param alpha     透明度(0.0 -- 1.0, 0.0为完全透明，1.0为完全不透明)
     */
    public static void pressText(String targetImg, String pressText,
                                 String fontName, int fontStyle, int fontSize, Color color, int x,
                                 int y, float alpha) {
        try {
            File file = new File(targetImg);

            Image image = ImageIO.read(file);
            int width = image.getWidth(null);
            int height = image.getHeight(null);
            System.out.println(width);
            System.out.println(height);
            BufferedImage bufferedImage = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufferedImage.createGraphics();
            g.drawImage(image, 0, 0, width, height, null);
            g.setFont(new Font(fontName, fontStyle, fontSize));
            g.setColor(color);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));

            int width_1 = fontSize * getLength(pressText);
            int height_1 = fontSize;
            int widthDiff = width - width_1;
            int heightDiff = height - height_1;
            if (x < 0) {
                x = widthDiff / 2;
            } else if (x > widthDiff) {
                x = widthDiff;
            }
            if (y < 0) {
                y = heightDiff / 2;
            } else if (y > heightDiff) {
                y = heightDiff;
            }

            g.drawString(pressText, x, y + height_1);
            g.dispose();
            ImageIO.write(bufferedImage, PICTRUE_FORMATE_JPG, file);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取字符长度，一个汉字作为 1 个字符, 一个英文字母作为 0.5 个字符
     *
     * @param text
     * @return 字符长度，如：text="中国",返回 2；text="test",返回 2；text="中国ABC",返回 4.
     */
    public static int getLength(String text) {
        int textLength = text.length();
        int length = textLength;
        for (int i = 0; i < textLength; i++) {
            if (String.valueOf(text.charAt(i)).getBytes().length > 1) {
                length++;
            }
        }
        return (length % 2 == 0) ? length / 2 : length / 2 + 1;
    }

    /**
     * 图片缩放
     *
     * @param filePath 图片路径
     * @param height   高度
     * @param width    宽度
     * @param bb       比例不对时是否需要补白
     */
    public static void resize(String filePath, int height, int width, boolean bb) {
        try {
            double ratio = 0; // 缩放比例
            File f = new File(filePath);
            String suffix = filePath.substring(filePath.lastIndexOf(".") + 1);

            BufferedImage bi = ImageIO.read(f);
            Image itemp = bi.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            // 计算比例
            if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
                if (bi.getHeight() > bi.getWidth()) {
                    ratio = (double) height / bi.getHeight();
                } else {
                    ratio = (double) width / bi.getWidth();
                }
                AffineTransformOp op = new AffineTransformOp(
                        AffineTransform.getScaleInstance(ratio, ratio), null);
                itemp = op.filter(bi, null);
            }
            if (bb) {
                BufferedImage image = new BufferedImage(width, height,
                        BufferedImage.TYPE_INT_RGB);
                Graphics2D g = image.createGraphics();
                g.setColor(Color.white);
                g.fillRect(0, 0, width, height);
                if (width == itemp.getWidth(null))
                    g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,
                            itemp.getWidth(null), itemp.getHeight(null),
                            Color.white, null);
                else
                    g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,
                            itemp.getWidth(null), itemp.getHeight(null),
                            Color.white, null);
                g.dispose();
                itemp = image;
            }
            ImageIO.write((BufferedImage) itemp, suffix, f);
        } catch (IOException e) {
            System.out.println(filePath);
            e.printStackTrace();
        }

    }

    /**
     * 图片缩放
     *
     * @param filePath 图片路径
     * @param height   高度
     * @param width    宽度
     * @param bb       比例不对时是否需要补白
     */
    public static void resizeCMYK(String filePath, int height, int width,
                                  boolean bb) {
        try {
            double ratio = 0; // 缩放比例
            File f = new File(filePath);
            String suffix = filePath.substring(filePath.lastIndexOf(".") + 1);
            JPEGImageDecoder decoder = JPEGCodec
                    .createJPEGDecoder(new FileInputStream(f));
            BufferedImage bi = decoder.decodeAsBufferedImage();

            // BufferedImage bi = ImageIO.read(f);
            Image itemp = bi.getScaledInstance(width, height, Image.SCALE_SMOOTH);
            // 计算比例
            if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
                if (bi.getHeight() > bi.getWidth()) {
                    ratio = (double) height / bi.getHeight();
                } else {
                    ratio = (double) width / bi.getWidth();
                }
                AffineTransformOp op = new AffineTransformOp(
                        AffineTransform.getScaleInstance(ratio, ratio), null);
                itemp = op.filter(bi, null);
            }
            if (bb) {
                BufferedImage image = new BufferedImage(width, height,
                        BufferedImage.TYPE_INT_RGB);
                Graphics2D g = image.createGraphics();
                g.setColor(Color.white);
                g.fillRect(0, 0, width, height);
                if (width == itemp.getWidth(null))
                    g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,
                            itemp.getWidth(null), itemp.getHeight(null),
                            Color.white, null);
                else
                    g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,
                            itemp.getWidth(null), itemp.getHeight(null),
                            Color.white, null);
                g.dispose();
                itemp = image;
            }
            ImageIO.write((BufferedImage) itemp, suffix, f);
        } catch (IOException e) {
            System.out.println(filePath);
            e.printStackTrace();
        }

    }

    /**
     * 获取文件类型
     *
     * @param f
     * @return
     */
    public static String getFormatName(File f) {
        try {
            ImageInputStream iis = ImageIO.createImageInputStream(f);

            Iterator<ImageReader> iter = ImageIO.getImageReaders(iis);
            if (!iter.hasNext()) {
                return null;
            }

            ImageReader reader = iter.next();
            iis.close();

            return reader.getFormatName();
        } catch (IOException e) {
        }
        return null;
    }

    /**
     * 获取图片的宽度和高度
     *
     * @param imagePath
     * @return
     */
    public static List<Integer> getwidthAndHeight(String imagePath) {
        BufferedImage bufferedImage = null;
        List<Integer> integers = new ArrayList<>();
        try {

            bufferedImage = ImageIO.read(new File(imagePath));
            int width = bufferedImage.getWidth();
            int height = bufferedImage.getHeight();
            integers.add(width);
            integers.add(height);
        } catch (IOException e) {
            e.printStackTrace();
            integers.add(0);
            integers.add(0);
        }

        return integers;
    }

    public static boolean isCMYK(String filename) {
        boolean result = false;
        BufferedImage img = null;
        try {
            img = ImageIO.read(new File(filename));
        } catch (IOException e) {

        }
        if (img != null) {
            int colorSpaceType = img.getColorModel().getColorSpace().getType();
            result = colorSpaceType == ColorSpace.TYPE_CMYK;
        }

        return result;
    }

    public static void main(String[] args) throws IOException {

        Thumbnails.of("/home/sniper/图片/2015070618434646757.jpg").size(200, 200)
                .toFile("/home/sniper/图片/2015070618434646757-1.jpg");

    }
}